Alvin b



(No Model.)

A. B. CLARK.

SPRING HOE- FOR GULTIVATORS.

No. 275,146. Patented Apr.3,1883.

\ ismz w m xM/Mz fizz/612K072 f7 @Mwa4 d UNITED STATES ATENT Enron.

ALVIN B. CLARK, OF RICHMOND, INDIANA, ASSIGNOR OF ONE-HALF TO JOHN B. DOUGAN, OF SAME PLACE.

SPRING-HOE FOR CULTIVATORS.

SPECIFICATION forming part of Letters Patent No. 275,146, dated April 3, 1883. Application filed December 7, 1862. (No model.)

To all whom it may concern:

Be it known that I, ALVIN B. (/LARK, a citizen ofthe United States, residing atBichmond, in the county of Wayne and State of Indiana, have invented certain new and useful Improvements in Spring-Hoes for Cultivators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others Skilled in the art to which it appertains to make and use the same, ref erence being bad to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in plows, more particularly to that class known as cultivators, sulkyplows, double-shovel plows, and the like.

The object of my invention is to construct a plow-standard that will, when the point or sides of the plow strike an obstruction, readily yield to a certain extent, to prevent breakage, until the obstruction is passed, when it will again assume its normal position. I accomplish this object by means of the following construction, which will be more fully pointed out in the specification and claim.

Similar letters of reference refer to similar parts of the drawings.

Figure 1 represents a perspective view of my improved plow standard and beam. Fig. 2 is a sectional longitudinal view of the same.

A is an ordinary plow-standard, formed either curved or straight, as desired. Its lower extremityis shod with a V-shaped shovelor any other suitable device for turning the soil. Its outer end is perforated at two points, through which pins to a. pass.

Beam B is formed of two strips of metal held about the same distance apart as the thickness of the standard A by cross-bars b I). These cross-bars are held in place by pins passing through the strips and cross-bars. Between the cross-bars b and the standard A is secured a metal loop, 0, that rises above the beam B. The center of this loop 0 is perforated to receive a pin, d. This pin cl has on its outer end an adjustable nut. On the opposite end of said bolt or pin (1 is secured, by means of ears mounted on a shaft that passes through the perforations in the ears of the pin (1. Between the center of the loop 0 and the ears of pin 61 is secured a coiled spring,f, that presses at one end against the shoulder above the roller 6, and at the other end against the center of the loop 0. The outer ends of beam B are perforated to receive the pin a, and the inner ends having perforations, a roller, 0. Said roller is the strips, by this construction forming an inclined surface on which the roller 6 is caused to traverse. The point of contact by the roller 0 in front of the incline stops the movement of the roller 0 until by a sudden jerk or strain the roller is moved upward above the point, and is carried forward along the surface of the incline, while the point of the shovel or plow is retarded.

At the inner end of beam C, and between the strips, is secured a metal loop, it, that is formed to pass between the metal strips of beam B. The outer portion of this loop is perforated to receive a pin, 71, the outer ends of which rest on the upper edges of the beam B. Lengthwise through this loop passes a rod, 45, on which is loosely slipped a coiled spring, j. One end of this spring presses against the inner edge of the loop k and the opposite end presses against inner face of the cross-bar b. The rod t is secured at one end to cross-bar b and at the opposite end to cross-bar I).

The operation of my device is as follows:

travel on the inclined surface of said cross-bar compressing springsfandj. Said springsdraw having inclined upper surface, as shown and 10 the parts back to their normal position when specified.

the obstruction is passed. In testimony whereofI affix my signature in Having thus described my invention, what presence of two witnesses. 5 I desire to secure by Letters Patent is- ALVIN B CLARK In a plow or cultivator, the standard A, beam B, having loop a, roller 6, pin 01, spring \Vitnesses: f, rod '5, and spring in combination with the W. E. BELL, beam 0, having loop 7:, pin h, and cross-bar g, IDA M. BELL. 

